Formatting cleanups.
- Remove lots of comments that were out-of-date, wrong, or now
  described things that had been simplified that much that the
  comments were no longer needed.
- Move the "static" definition from a line before functions onto the
  same line as the function itself.
- Remove "return;" from the end of void functions.
- Remove braces from around single instructions.
- Merge the declaration and assignment to variables in places where
  the followed each other.
- Remove braces from around single statement that obviously didn't
  need them.
- Remove unused code and variables.
- Fix debug statement in disconnect to not deref potentially null
  ptr.
- Change a lot of short comments that take up three lines down to one
  line.